FEATURE: number of new topics at the end of summary email can be controlled by a new setting, digest_other_topics

app/mailers/user_notifications.rb

@@ -130,7 +130,7 @@ class UserNotifications < ActionMailer::Base
     end
 
     # Now fetch some topics and posts to show
-    topics_for_digest = Topic.for_digest(user, min_date, limit: SiteSetting.digest_topics + 3, top_order: true).to_a
+    topics_for_digest = Topic.for_digest(user, min_date, limit: SiteSetting.digest_topics + SiteSetting.digest_other_topics, top_order: true).to_a
 
     @popular_topics = topics_for_digest[0,SiteSetting.digest_topics]
     @other_new_for_you = topics_for_digest.size > SiteSetting.digest_topics ? topics_for_digest[SiteSetting.digest_topics..-1] : []

config/locales/server.en.yml

@@ -1286,8 +1286,9 @@ en:
     allow_animated_thumbnails: "Generates animated thumbnails of animated gifs."
     default_avatars: "URLs to avatars that will be used by default for new users until they change them."
     automatically_download_gravatars: "Download Gravatars for users upon account creation or email change."
-    digest_topics: "The maximum number of topics to display in the email summary."
+    digest_topics: "The maximum number of popular topics to display in the email summary."
     digest_posts: "The maximum number of popular posts to display in the email summary."
+    digest_other_topics: "The maximum number of topics to show in the 'New in topics and categories you follow' section of the email summary."
     digest_min_excerpt_length: "Minimum post excerpt in the email summary, in characters."
     delete_digest_email_after_days: "Suppress summary emails for users not seen on the site for more than (n) days."
     digest_suppress_categories: "Suppress these categories from summary emails."

config/site_settings.yml

@@ -588,6 +588,7 @@ email:
     default: 5
     min: 1
   digest_posts: 3
+  digest_other_topics: 5
   delete_digest_email_after_days: 365
   digest_suppress_categories:
     type: category_list